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3,334
RESULTS

Media Type
3,141
texts
98
movies
59
audio
26
images
9
data
1
web
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Topics & Subjects
475
Machinery
254
Agricultural machinery
223
Mechanical engineering
218
Electric machinery
185
Manufactures
184
Electric engineering
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Collection
1,896
American Libraries
442
Canadian Libraries
376
FEDLINK - United States Federal Collection
304
The Library of Congress
303
The National Agricultural Library
265
California Digital Library
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Creator
149
nasa technical reports server (ntrs)
148
eric
82
united states.: national recovery administration
26
allis-chalmers manufacturing company
26
defense technical information center
22
elektrotechnischer verein in wien
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Language
2,808
English
163
undetermined
121
German
56
French
16
English and French
13
Italian
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